[NTLUG:Discuss] DHCP diagnostic program

[Leroy Tennison]

On 05/09/2011 10:05 AM, Preston Hagar wrote:
> On Thu, May 5, 2011 at 11:41 PM, Leroy Tennison
> <leroy_tennison at prodigy.net>  wrote:
>> I'm looking for a program to test DHCP server responses.  Specifically, I
>> need a program where I can specify the DHCP server and options I want
>> returned (option 176 specifically since this is telephony-related) and have
>> it display the results (preferably without assigning anything to the host).
>>   Any ideas?  Thanks for your help.
>>
> This may be too basic for what you are looking for, but the check_dhcp
> script in Nagios can do most of what you want.   In ubuntu, you would
> do
>
> apt-get install nagios-plugins
>
> then, go to /usr/lib/nagios/plugins
>
> > From there, you could run something like
>
> ./check_dhcp -v -i eth2 -s 10.1.254.253
>
> which would specify verbose, use eth2, and use 10.1.254.253 for the
> DHCP server.  You can also specify the MAC address you want to send if
> you want to.   Running the command above against my DCHP server
> returns:
>
> http://pastebin.com/4mwcnVDr
>
> Not sure if that helps or not.  If I run it with a -m and put in the
> MAC address of a phone, then I get the extra 66, 67, 128, 129, 130
> options our phones get (we have a Mitel VoIP system).  It doesn't seem
> to show the values being sent though for the phones, so I am not sure
> how much help it might be.
>
> Also, we use the ISC dhcp server and use it for our Mitel 5212, 5224,
> and 5500 phones.  If it would be of any help to you, I would be glad
> to share the config file.
>
> Preston
>
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>
I'm not going to reject anything at this point because I've just begun 
my search, thanks for the pointer.